KR102377960B1 - Display device - Google Patents

Abstract

The present application provides a display device having excellent touch sensitivity while the corner area of the screen is formed in a curved shape. The display device according to the present application includes a display panel including a touch area having a corner touch area, a plurality of gate lines, and It includes a plurality of pixel areas defined by the intersection of a plurality of data lines, and a plurality of common electrodes arranged to overlap at least one pixel area, and a first common electrode arranged on a corner touch area among the plurality of common electrodes. have a different shape from the second common electrodes disposed on the remaining touch areas except the corner touch area.

Description

Display device {DISPLAY DEVICE}

This application relates to a display device.

In the information society, many related technologies are being developed in the field of display devices for displaying visual information in images or images. In particular, there is a touch display device that has a display panel that can recognize the location of the touch and the intensity of the touch when the user touches or applies force with a finger or pen on a display area that displays an image. Touch display devices are not limited to smart phones, mobile communication terminals, or mobile phones, but also include tablet PCs (personal computers) and smart watches, for immediate and interactive communication between users and machines. It is widely used in devices such as watches, watch phones, wearable devices, electronic notebooks, e-books, portable multimedia players (PMPs), navigation, televisions, laptops, monitors, cameras, camcorders, and home appliances.

The touch display device may be an on-cell type in which a touch panel including touch electrodes for recognizing a touch is provided separately from the display panel for displaying an image, or a touch configuration including touch electrodes for recognizing a touch. It can be classified into an in-cell method built into a display panel that displays images.

Recent display devices have curved (or rounded) corner areas of the housing and cover window, which allows for improved aesthetics in terms of design due to the more natural shape of the corner area, and allows the screen in the corner area to be displayed more naturally. there is.

The object of this application is to provide a display device that has excellent touch sensitivity while the corner area of the screen is formed in a curved shape.

A display device according to an example of the present application includes a substrate including a touch area having a corner touch area, a plurality of pixel areas defined by the intersection of a plurality of gate lines and a plurality of data lines, and at least one pixel area overlapping with the other. It includes a plurality of common electrodes arranged to .

A display device according to an example of the present application includes a substrate including a touch area having a corner touch area, a plurality of pixel areas defined by the intersection of a plurality of gate lines and a plurality of data lines, and a plurality of pixel areas that overlap with at least one pixel area. It includes a plurality of common electrodes disposed, and a plurality of touch link lines electrically connected to the plurality of common electrodes, and a first line between the touch link lines passing through the first common electrode disposed on the corner touch area among the plurality of touch link lines. The 1 interval may be different from the second interval between the touch link lines passing through the second common electrodes disposed on the remaining touch areas excluding the corner touch area.

The display device according to the present application can have an improved aesthetic sense in terms of design as the corner area of the screen is formed in a curved shape, the screen in the corner area can be displayed more naturally, and the screen in the corner area can be displayed more naturally, and the screen in the corner area can be displayed uniformly not only in the corner area but also in the entire touch area. Can have touch sensitivity.

1 and 2 are block diagrams of a display device according to the present application.
Figure 3 is a circuit diagram showing a pixel according to an example of the present application.
FIG. 4 is a waveform diagram showing a common voltage and a touch driving signal supplied to common electrodes during a display period and a touch period of one frame period of the display device according to the present application.
Figure 5 is a perspective view of a display device according to the present application.
FIG. 6 is a plan view illustrating a connection structure between a plurality of common electrodes and a driving circuit unit in a display device according to an example of the present application.
FIG. 7 is a plan view showing a connection structure between a plurality of common electrodes and a driving circuit unit in a display device according to another example of the present application.
Figure 8 is an enlarged view of portion A shown in Figure 7.
FIG. 9 is a plan view showing a connection structure between a plurality of common electrodes and a driving circuit unit in a display device according to another example of the present application.
Figure 10 is an enlarged view of part B shown in Figure 9.

The advantages and features of the present application and methods for achieving them will become clear by referring to the examples described in detail below along with the accompanying drawings. However, the present application is not limited to the examples disclosed below, but will be implemented in various different forms. These examples only serve to ensure that the disclosure of the present invention is complete, and are provided to those skilled in the art to which the present application pertains. It is provided to fully inform the scope of the invention, and the present application is defined only by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining examples of the present application are illustrative, and the present invention is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present application.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

Each feature of the various examples of the present application can be partially or entirely combined or combined with each other, and various technological interconnections and operations are possible, and each example may be implemented independently of each other or together in a related relationship. .

Hereinafter, an example of the present application will be described in detail with reference to the attached drawings.

1 and 2 are block diagrams of a display device according to the present application. Figure 3 is a circuit diagram showing a pixel according to an example of the present application. Hereinafter, the description will focus on the case where the display device according to the present application is a liquid crystal display device.

The display device according to the present application includes a display panel 10, a timing controller 20, a gate driver 30, a data driver 40, a main processor 50, a touch driver 60, and a common voltage. Includes a compensation unit 70.

The display panel 10 includes a lower substrate, an upper substrate, and a liquid crystal layer interposed between the lower substrate and the upper substrate. Data lines (D1 to Dm), gate lines (G1 to Gn), touch link lines (T1 to Tp), and feedback lines (FL) are formed on the lower substrate of the display panel 10.

The gate lines (Gn to Gn) are arranged in the first direction. The first direction is defined as the X-axis direction in FIG. 1. The data lines D1 to Dm are arranged in a second direction crossing the first direction. The second direction is defined as the Y-axis direction in FIG. 1. Accordingly, the data lines D1 to Dm are arranged to intersect the gate lines G1 to Gn. Pixels P may be formed at intersections of the data lines D1 to Dm and the gate lines G1 to Gn. Pixels (P) may be connected to data lines (D1 to Dm) and gate lines (G1 to Gn). The touch link lines T1 to Tp extend in a direction parallel to the first direction (X) or the second direction (Y). Although FIG. 1 illustrates the case where the touch link lines T1 to Tp extend in a direction parallel to the second direction (Y), the touch link lines are not limited to this and may extend in a direction parallel to the first direction (X). there is.

Each of the pixels (P) may include a transistor (TFT), a pixel electrode (11), a common electrode (TE), and a storage capacitor (Cst). The transistor (TFT) is turned on by the gate signal of the kth (k is a positive integer satisfying 1≤k≤n) gate line (Gk) and is turned on by the jth (j is a positive integer satisfying 1≤k≤n). (a positive integer satisfying m), the data voltage of the data line Dj is supplied to the pixel electrode 11.

The common electrode (TE) receives the common voltage (Vcom) from the touch link lines (T1 to Tp) connected to the touch driver 60. As a result, each of the pixels P is connected to the liquid crystal layer 13 by an electric field generated by the potential difference between the data voltage supplied to the pixel electrode 11 and the common voltage Vcom supplied to the common electrode TE. The amount of light transmitted from the backlight unit can be adjusted by driving. As a result, the pixels P can display an image. The storage capacitor Cst is provided between the pixel electrode 11 and the common electrode TE to keep the voltage difference between the pixel electrode 11 and the common electrode TE constant.

The common electrode (TE) is provided to overlap at least one pixel, and may be defined as a touch sensor or touch electrode for touch sensing. For example, the common electrode (TE) may be made of a transparent conductive material such as indium tin oxide (ITO).

One common electrode (TE) may have a size corresponding to a plurality of pixels. For example, one common electrode (TE) has 40 pixels in a first direction (X) parallel to the longitudinal direction of the gate lines (G1 to Gn) and a second direction parallel to the longitudinal direction of the data lines (D1 to Dm). (Y) can have a size corresponding to 12 pixels. In this case, one common electrode (TE) may have a size corresponding to 480 pixel areas. However, it is not limited to this, and the size of each common electrode TE may vary depending on the size (or resolution) of the display panel and the touch resolution.

The feedback line FL connects the common voltage compensator 70 and at least one of the pixels P. The feedback line FL feeds back the common voltage Vcom supplied to at least one pixel P to the common voltage compensator 70.

A black matrix and a color filter may be formed on the upper substrate of the display panel 10 to separate the pixels P so that the light emitted from the pixels P is not mixed. . However, when the display panel 10 is formed with a color filter on TFT (COT) structure, the black matrix and the color filter may be formed on the lower substrate of the display panel 10.

A polarizer is attached to each of the upper and lower substrates of the display panel 10, and an alignment film is formed to set the pre-tilt angle of the liquid crystal. A column spacer is formed between the upper and lower substrates of the display panel 10 to maintain a cell gap of the liquid crystal cell.

The display panel 10 includes a display area consisting of a plurality of picture elements P, and a non-display area surrounding the display area. At this time, each corner of the display area may have a curved shape with a predetermined radius of curvature.

A backlight unit may be disposed under the rear surface of the lower substrate of the display panel 10. The backlight unit is implemented as an edge type or a direct type and irradiates light to the display panel 10.

The timing controller 20 receives timing signals (TS) and digital video data (DATA) from the main processor 50. Timing signals TS may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, a dot clock, etc. The vertical synchronization signal is a signal that defines 1 frame period. The horizontal synchronization signal is a signal that defines one horizontal period during which data voltages are simultaneously supplied to one pixel column arranged in a direction parallel to the direction in which the gate lines (G1 to Gn) of the display panel 10 extend. Pixels arranged on a pixel column are connected to the same gate line. The data enable signal is a signal that defines the period during which valid digital video data (DATA) is supplied. The dot clock is a clock signal that repeats at a preset period by a timer inside the timing controller 20.

The timing controller 20 may generate a mode signal (MODE) to distinguish between the display mode and the touch mode based on the vertical synchronization signal. For example, the timing controller 20 divides one frame period according to the vertical synchronization signal into a display period and a touch period, outputs a mode signal (MODE) of the first logic level voltage during the display period, and outputs a mode signal (MODE) of the first logic level voltage during the touch period. A mode signal (MODE) of 2 logic level voltage can be output.

The timing controller 20 provides a gate drive control signal (GCS) for controlling the operation timing of the gate driver 30 and a data drive control for controlling the operation timing of the data driver 40 based on the timing signals TS. Generates a signal (DCS). The timing controller 20 generates a touch control signal (TCS) to control the operation timing of the touch driver 60. The timing controller 20 can output a gate driving control signal (GCS) to the gate driver 30 and digital video data (DATA) and a data driving control signal (DCS) to the data driver 40 during the display period. there is. The timing controller 20 may output a touch control signal (TCS) and a mode signal (MODE) to the touch driver 60.

The gate driver 30 generates gate signals according to the gate driver control signal GCS supplied from the timing controller 20 during the display period. The gate driver 30 supplies gate signals to the gate lines G1 to Gn in a predetermined order during the display period. The predetermined order may be a sequential order. The gate driver 30 according to one example may be integrated (or embedded) in a non-display area on one side of the display panel 10 along with the manufacturing process of the transistor (TFT) and connected one-to-one with the gate lines (G1 to Gn). there is. As another example, the gate driver 30 may be made of an integrated circuit and may be mounted on the display panel 10 and connected one-to-one with the gate lines G1 to Gn.

The data driver 40 receives digital video data (DATA) and a data driver control signal (DCS) from the timing controller 20 during the display period. The data driver 40 converts digital video data (DATA) into analog data voltages according to the data driver control signal (DCS) during the display period. The data driver 40 supplies data voltages to the data lines D1 to Dm during the display period.

The main processor 50 may be implemented as a central processing unit (CPU), a host processor, an application processor, or a graphics processing unit (GPU) mounted on the main board of the display device. The main processor 50 converts digital video digital video data (DATA) and timing signals (TS) into a format suitable for display on the display panel 10 and transmits it to the timing controller 20.

The main processor 50 may receive touch coordinate data (CD) from the touch driver 60. The main processor 50 may execute an application or application program linked to the coordinates where a touch occurred by the user according to the touch coordinate data (CD). The main processor 50 may transmit digital video data (DATA) and timing signals (TS) according to the execution program to the timing controller 20.

The touch driver 60 receives a touch control signal (TCS) and a mode signal (MODE) from the timing controller 20. The touch driver 60 receives the common voltage (Vcom) from the common voltage compensator 70.

The touch driver 60 may operate by dividing the display period and the touch period according to the mode signal MODE from the timing controller 20.

The touch driver 60 receives the common voltage Vcom supplied from the common voltage compensator 70 and simultaneously supplies the common voltage Vcom to the common electrodes TE during the display period.

The touch driver 60 generates a touch drive signal (TDS) according to the touch control signal (TCS) during the touch period. The touch driver 60 may supply the touch drive signal TDS to the touch link lines T1 to Tp in a predetermined order. When the predetermined order is a sequential order, the touch driver 60 may sequentially supply the touch drive signal TDS to the first to pth touch link lines T1 to Tp.

The touch driver 60 receives touch sensing signals according to changes in capacitance of each common electrode (TE) through the touch link lines (T1 to Tp). The touch driver 60 may calculate touch coordinates where a touch occurs by calculating touch sensing signals using a predetermined algorithm. The touch driver 60 supplies touch coordinate data (CD) including touch coordinates to the main processor 50. In this case, the main processor 50 executes an application or application program linked to the coordinates where a touch occurred by the user according to the touch coordinate data (CD) and sends digital video data (DATA) and timing signals according to the executable program. It is transmitted to the timing controller (20).

Optionally, the touch driver 60 may generate touch raw data by converting touch sensing signals into analog-to-digital, and provide the generated touch raw data to the main processor 50. In this case, the main processor 50 calculates the touch coordinates where the touch occurred by calculating the touch raw data provided from the touch driver 60 using a predetermined algorithm, and executes an application or application program linked to the touch coordinates. It may be possible.

The common voltage compensator 70 compensates so that the potential of the common voltage (Vcom) is maintained constant based on the feedback result, and supplies the common voltage (Vcom) with a constant potential to the touch driver 60. That is, the common voltage compensator 70 receives feedback of the common voltage (Vcom) supplied to the common electrode through the feedback line (FL) and adjusts the potential of the common voltage (Vcom) to supply the common voltage (Vcom) to the common electrode during the display period. Keep the voltage potential constant. The common voltage compensator 70 according to an example compensates for the amount of change in common voltage of the common electrodes TE from the feedback line FL based on the reference common voltage input from the power supply. At this time, the common voltage compensator 70 operates divided into a display period and a touch period, and compensates the common voltage Vcom according to the amount of voltage change in the feedback line FL only during the display period. For example, the common voltage compensator 70 compensates for the common voltage change due to unspecified noise generated in the display panel 10 by inverting and amplifying the common voltage change reflected in the feedback line FL at the reference common voltage level. A common voltage can be output.

In the display device according to an example of the present application, the timing controller 20, the data driver 40, the touch driver 60, and the common voltage compensator 70 are a driving circuit implemented as a single integrated circuit (or integrated It may be composed of a driving integrated circuit). Furthermore, the gate driver 30 may not be built into the display panel 10 but may be built into the driving circuit part.

1 and 2, the display device according to an example of the present application is configured with an in-cell touch method that uses the common electrode (TE) provided on the display panel 10 as a touch electrode, thereby providing a separate It can be thin as there is no need for a touch panel. However, the display device according to an example of the present application can also be applied to an on-cell touch method in which a separate touch panel having touch electrodes and touch routing lines is disposed on the display panel.

FIG. 4 is a waveform diagram showing a common voltage and a touch driving signal supplied to common electrodes during a display period and a touch period of one frame period of the display device according to the present application.

In order to perform both image display and touch sensing, the display device according to the present application is driven by dividing 1 frame period into a display period (DP) and a touch period (TP). The timing controller 20 may operate the in-cell touch display device according to the present application in a display mode during a display period (DP) of 1 frame period and in a touch mode during a touch period (TP). For example, if 1 frame period is 16.7ms, the display period (DP) can be separated into 10.7ms and the touch period can be separated into 6ms within 1 frame period, but it is limited to this. It doesn't work.

The touch driver 60 supplies the common voltage Vcom to the common electrodes TE through the touch link lines T1 to Tp during the display period DP. Additionally, the touch driver 60 supplies a touch driving signal (TDS) to the common electrodes (TE) through the touch link lines (T1 to Tp) during the touch period (TP), and the touch link lines (T1 to Tp). ) to sense the change in capacitance of the common electrodes (TE). Accordingly, the common electrode (TE) is used as a touch electrode for touch sensing during the touch period (TP).

Although FIG. 4 illustrates that one frame period includes one display period (DP) and one touch period (TP), it should be noted that the present invention is not limited thereto. That is, one frame period may include a plurality of display periods (DP) and a plurality of touch periods (TP). The touch driving signal (TDS) may include a plurality of pulses. Additionally, in FIG. 4 , the touch driving signal TDS has a voltage level higher than the common voltage Vcom, but the description is not limited thereto. That is, the touch driving signal TDS may have a voltage level lower than the common voltage Vcom.

Figure 5 is a perspective view of a display device according to the present application.

Referring to FIG. 5 , the display device according to the present application includes a cover window 300 and a housing 500.

The cover window 300 is arranged to cover the entire front of the display panel and is supported on the housing 500, or is attached to the entire front of the display panel 10 and supported on the housing 500. This cover window 300 may be made of tempered glass, transparent plastic, or transparent film.

The cover window 300 includes a transparent area (TA), a decoration area (DA), and a rounded corner part (CP).

The transparent area TA is provided in the central area of the cover window 300 to overlap the display area (or touch area) of the display panel, and may be defined as an area through which an image displayed on the display panel transmits. The transparent area TA may include rounding parts RP1, RP2, RP3, and RP4 provided at each corner, and the rounding parts RP1, RP2, RP3, and RP4 may have a curved shape with a predetermined radius of curvature. You can.

The decoration area DA is provided in the edge area of the cover window 300 excluding the transparent area TA, and covers the remaining area excluding the display area of the display panel. The decoration area DA may be expressed as a printed layer printed on the cover window to have a predetermined color. This deco area (DA) includes a camera hole, a sensor hole, a camera flash hole, and a speaker hole.

The rounded corner portion CP is formed in a curved shape with a predetermined radius of curvature at each corner of the cover window 300. The housing 500 supports the cover window 300 while accommodating the display panel 10. . The housing 500 directly covers the rear and each side of the display panel 10 attached to the cover window 300. Each corner of the housing 500 is rounded in a curved shape with a predetermined radius of curvature corresponding to the rounded corner CP of the cover window 300.

As such, the display device according to the present application has an improved design due to a more natural shape of the corner area by rounding the corner portions CP of each of the cover window 300 and the housing 500 in a curved shape instead of having a right angle shape. It can provide aesthetics, and the screen in the corner area can be displayed more naturally.

FIG. 6 is a plan view illustrating a connection structure between a plurality of common electrodes and a driving circuit unit in a display device according to an example of the present application.

Referring to FIG. 6, the display device according to an example of the present application includes a plurality of common electrodes (TE) disposed on a touch area (TA) defined on the display panel, and a one-to-one connection with the plurality of common electrodes (TE). It includes a plurality of touch link lines (T1 to Tp) and a driving circuit unit 900 connected to the plurality of touch link lines (T1 to Tp).

The touch area TA is defined to overlap the display area of the display panel. Each corner TAa of the touch area TA is rounded in a curved shape with a predetermined radius of curvature. The touch area TA may include corner touch areas CTA adjacent to each corner TAa, and non-corner touch areas other than the corner touch areas CTA. For example, the corner touch areas CTA may include upper left, upper right, lower left, and lower right corner areas of the touch area TA based on the plane. And, the non-corner touch area is the center area of the touch area (TA), the left edge area of the center area, excluding the upper left, upper right, lower left, and lower right corner areas of the touch area (TA), based on the plane. , may include a right edge area of the central area, an upper edge area of the central area, and a lower edge area of the central area.

The plurality of common electrodes TE are arranged to be spaced apart from each other on the touch area TA defined on the display panel. At this time, among the plurality of common electrodes, the corner common electrodes TE1 disposed on the corner touch area CTA are the non-corner common electrodes TE2 disposed on the remaining touch areas TA except for the corner touch area CTA. ) and has a different shape. That is, the plurality of common electrodes TE disposed on the corner touch area CAT of the touch area TA may be defined as corner common electrodes TE1 (or first common electrodes), and the touch area TA ), the plurality of common electrodes (TE) disposed on the remaining touch areas (TA), excluding the corner touch area (CAT), will be defined as non-corner common electrodes (TE2) (or central common electrodes or second common electrodes). You can. Here, the corner common electrodes TE1 may be expressed as a first common electrode, and the non-corner common electrodes TE2 may be expressed as a second common electrode or a center common electrode.

The corner common electrodes TE1 according to one example may have a different shape (or size) than the non-corner common electrodes TE2. For example, the corner common electrodes (TE1) have a square shape, and a chamfer (TE1a) is chamfered in a diagonal or straight line on one corner adjacent to the corner (TAa) of the touch area (TA). ) includes. The non-corner common electrodes TE2 have a square shape.

The plurality of touch link lines T1 to Tp are electrically connected one-to-one to the plurality of common electrodes TE and extend in a direction parallel to the first direction (X) or the second direction (Y). The plurality of touch link lines T1 to Tp are arranged at regular intervals along a direction intersecting the extension direction.

Each of the plurality of touch link lines (T1 to Tp) is electrically connected to the corresponding common electrode (TE) through a contact hole (CH).

For example, when five touch link lines (T1 to T5, T6 to T10, Tp-4 to Tp) are arranged to overlap five common electrodes (TE) arranged along the second direction (Y), the first The first touch link lines (T1, T6, Tp-4) are respectively connected to the common electrodes (TE) arranged in the first column, and the second touch link lines (T2, T7, Tp-3) are connected to the common electrodes (TE) arranged in the first column. are respectively connected to the common electrodes (TE) arranged in the third column, and the third touch link lines (T3, T8, Tp-2) are respectively connected to the common electrodes (TE) arranged in the third column, and the fourth touch link line (T4, T9, Tp-1) are each connected to the common electrodes (TE) arranged in the fourth row, and the fifth touch link lines (T5, T10, Tp) are connected to the common electrodes (TE) arranged in the fifth row. TE) can be connected to each other.

Each of the plurality of touch link lines (T1 to Tp) is made of a metal or alloy that has better electrical conductivity than the common electrodes (TE). According to one example, a plurality of touch link lines (T1 to Tp) include molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Ti), titanium/aluminum/titanium (Ti/Al/ It may have a single-layer or multi-layer structure made of metal materials such as Ti) and molybdenum/aluminum/molybdenum (Mo/Al/Mo).

The driving circuit unit 900 is connected one-to-one with a plurality of touch link lines (T1 to Tp). This driving circuit unit 900 supplies a common voltage to the plurality of common electrodes TE through each of the plurality of touch link lines T1 to Tp during the display period. Then, the driving circuit unit 900 supplies the touch driving signal (TS) to each of the plurality of common electrodes (TE) through each of the plurality of touch link lines (T1 to Tp) during the touch period, and then again to the touch link lines ( Changes in capacitance of common electrodes (TE) are sensed through T1~Tp). This driving circuit unit 900 is an integrated circuit or integrated circuit including the timing controller 20, data driver 40, touch driver 60, and common voltage compensation unit 70 shown in FIGS. 1 and 2. It may be a driving integrated circuit. Furthermore, the driving circuit unit 900 may further include the gate driving unit 30 shown in FIGS. 1 and 2.

As such, in an example of the present application, the chamfer portion TE1a is formed on one corner of the corner common electrodes TE1 facing the corner portion TAa of the touch area TA, and the chamfer portion TE1a is formed on a corner portion of the touch area TA. By rounding the portion (TAa) into a curved shape, the corner area of the display device can be realized in a more natural curved shape, thereby improving the design aesthetics of the display device.

FIG. 7 is a plan view showing a connection structure between a plurality of common electrodes and a driving circuit in a display device according to another example of the present application, and FIG. 8 is an enlarged view of portion A shown in FIG. 7, which is shown in FIG. 6. It is configured by changing the arrangement of a plurality of touch link lines. Accordingly, in the following description, only the plurality of touch link lines and components related thereto will be described, and redundant descriptions of the remaining components will be omitted or briefly described.

Referring to FIGS. 7 and 8 , in the display device according to the present example, each of the plurality of touch link lines T1 to Tp is connected to the plurality of common electrodes TE in a one-to-one connection through the plurality of contact holes CH.

Each of the plurality of touch link lines (T1 to Tp) is made of a metal or alloy that has better electrical conductivity than the common electrodes (TE). For example, the plurality of touch link lines (T1 to Tp) include molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Ti), and titanium/aluminum/titanium (Ti/Al /Ti), molybdenum/aluminum/molybdenum (Mo/Al/Mo), etc. may have a single-layer or multi-layer structure.

Among the plurality of touch link lines (T1 to Tp), the touch link lines passing through the non-corner common electrode (TE2) and the corner common electrode (TE1) are arranged at a first interval (D1), and only the non-corner common electrode (TE2) The passing touch link lines may be arranged at a second interval D2 that is different from the first interval D1. Here, the first gap D1 may be narrower than the second gap D2.

According to one example, the plurality of touch link lines T1 to Tp may be divided into a first group TLG1 and a second group TLG2.

The first group (TLG1) is parallel to the second direction (Y) and spaced apart at a first distance (D1) along the first direction (X), and includes a non-corner common electrode (TE2) and a corner common electrode (TE1). It includes passing touch link lines (T1 to T5, Tp-4 to Tp).

The touch link lines (T1 to T5, Tp-4 to Tp) of the first group (TLG1) are located on both edges of the touch area (TA) including the corner touch area (CAT) of the touch area (TA). It is placed. Accordingly, the touch link lines (T1 to T5 and Tp-4 to Tp) of the first group (TLG1) have a plurality of ratios with the two corner common electrodes (TE1) based on the second direction (Y). It is arranged to pass through all of the corner common electrodes TE2. For example, five touch link lines (T1 to T5, Tp-4 to Tp) having a first gap (D1) may pass on one corner common electrode (TE1), but are not necessarily limited thereto.

The second group TLG2 is parallel to the second direction Y and is spaced apart from the first distance D1 at a second distance D2 along the first direction X, and includes non-corner common electrodes TE2. Includes touch link lines (T6 to T10) passing through the bay.

The touch link lines (T6 to T10) of the second group (TLG2) are connected to the touch area (TA) excluding both edges of the touch area (TA) including the corner touch area (CAT) of the touch area (TA). placed on the table. Accordingly, the touch link lines T6 to T10 of the second group TLG2 are arranged to pass only the non-corner common electrodes TE2 based on the second direction Y. For example, five touch link lines (T6 to T10) having a second gap (D2) may pass on the non-corner common electrodes (TE1), but are not necessarily limited thereto.

The touch link lines (T1 to T5, Tp-4 to Tp) of the first group (TLG1) disposed on the corner common electrode (TE1) except for the chamfer portion (TE1a) provided in the corner common electrode (TE1). It overlaps with the area. That is, the touch link lines (T1 to T5 and Tp-4 to Tp) of the first group (TLG1) do not pass through or overlap the chamfered portion (TE1a) provided in the corner common electrode (TE1). No. Accordingly, the touch link lines (T1 to T5, Tp-4 to Tp) of the first group (TLG1) are connected to the second group so that they can completely pass through the remaining portion of the corner common electrode (TE1) spaced apart from the chamfer portion (TE1a). It has a first gap (D1) that is narrower than the gap (D2). That is, the touch link lines (T1 ~ T5, Tp-4 ~ Tp) of the first group (TLG1) are spaced apart from the chamfer portion (TE1a) of the corner common electrode (TE1), and thus the touch link lines (TLG2) of the second group (TLG2) It has a narrower pitch than the pitch of the lines (T6 to T10).

Each of the common electrodes TE and the plurality of touch link lines T1 to Tp are electrically connected to each other through the same number of contact holes CH. For example, each of the plurality of common electrodes TE and the plurality of touch link lines T1 to Tp may be electrically connected to each other through three contact holes CH, but is not limited to this, and N ( N can be electrically connected to each other through contact holes (CH), which are a natural number of 2 or more.

Among the touch link lines (T1 to T5, Tp-4 to Tp) of the first group (TLG1), the first touch link lines (T1, Tp-4) and the last touch link lines (T5, Tp) are each It can be electrically connected to the corresponding corner common electrodes (TE1) through three contact holes (CH), and the remaining touch link lines (T2 to T4, Tp-3 to Tp-1) are also connected to the corresponding corner common electrodes (TE1) through three contact holes (CH). It can be electrically connected to the non-corner common electrodes (TE2) through CH). Likewise, each of the touch link lines T6 to T10 of the second group TLG2 may be electrically connected to the corresponding non-corner common electrodes TE2 through three contact holes CH.

The contact hole (CH) is provided in the intersection area of the touch link lines (T1 to T10) and the common electrode (TE) to electrically connect the touch link lines (T1 to T10) to the common electrode (TE). At this time, the contact area between the touch link lines (T1~T10) and the common electrode (TE) is set by the number of contact holes (CH), and is located in the intersection area of the touch link lines (T1~T10) and the common electrode (TE). It increases as the number of contact holes (CH) provided increases. As the contact area between the touch link lines (T1 to T10) and the common electrode (TE) increases, the contact resistance between the touch link lines (T1 to T10) and the common electrode (TE) may decrease. Accordingly, in this example, the touch link of the first group TLG1 is electrically connected to the corner common electrodes TE1 based on the width W1 of the chamfer portion TE1a provided in the corner common electrodes TE1. The first spacing D1 (or pitch) of the lines T1 to T5 and Tp-4 to Tp is connected to the touch link lines of the second group TLG2, which are electrically connected to the non-corner common electrodes TE2. By setting it to be narrower than the second interval D2 (or pitch) of T6 to T10), the contact area (or number of contact holes) between the corner common electrodes TE1 and the touch link lines (T1 to T5, Tp-4 to Tp) ) and the contact area (or number of contact holes) between the non-corner common electrodes TE2 and the touch link lines T6 to T10 can be made the same.

Additionally, the display device according to this example further includes a dummy line (DTL).

Each of the dummy lines (DTL) according to an example is parallel to the touch link lines (T6 to T10) on each of the non-corner common electrodes (TE2) and between two adjacent touch link lines (T6 to T10). It is placed. At this time, at least one dummy line (DTL) may be disposed between two adjacent touch link lines (T6 to T10). Each of these dummy lines (DTL) is electrically connected to the corresponding common electrode (TE) through a dummy contact hole (DCH). The dummy lines DTL disposed on each of the two non-corner common electrodes TE2 adjacent in the second direction Y are not electrically connected to each other but are electrically separated from each other. That is, the dummy lines DTL are disposed only on the non-corner common electrodes TE2.

According to one example, each of the dummy lines DTL is arranged side by side with the outer edges of the corner common electrodes TE1 so as to be parallel to the touch link lines T6 to T10 on each of the corner common electrodes TE1. . Each of these dummy lines (DTL) is electrically connected to the corresponding corner common electrode (TE1) through the dummy contact hole (DCH). At this time, each of the dummy lines (DTL) disposed on the corner common electrodes (TE1) is connected to the dummy lines (DTL) disposed on each of the adjacent non-corner common electrodes (TE2) along the second direction (Y). They are not electrically connected to each other but are electrically separated.

The dummy lines (DTL) according to one example are made of a metal or alloy that has better electrical conductivity than the common electrode (TE). For example, the dummy lines DTL may be made of the same metal material as the plurality of touch link lines T1 to Tp. These dummy lines (DTL) prevent the color shift phenomenon occurring in the image transmitted through the common electrode (TE) by the touch link lines (T6 to T10), and the common electrodes made of a transparent conductive material Increases touch sensitivity by reducing the sheet resistance of (TE).

As such, the display device according to the present example uses a non-corner common electrode having different shapes (or different sizes) because the contact areas between the common electrodes TE and the corresponding touch link lines T1 to Tp are all the same. The difference in touch sensitivity between the electrodes TE2 and the corner common electrodes TE1 may be minimized, and as a result, the touch sensitivity for the corner touch area CTA may be improved.

FIG. 9 is a plan view showing a connection structure between a plurality of common electrodes and a driving circuit in a display device according to another example of the present application, and FIG. 10 is an enlarged view of portion B shown in FIG. 9, which is shown in FIG. 7. It is constructed by changing the shape of the corner common electrodes. Accordingly, in the following description, only the corner common electrode and components related thereto will be described, and redundant descriptions of the remaining components will be omitted or briefly described.

Referring to FIGS. 9 and 10 , in the display device according to the present example, the corner common electrodes TE1 may have a different shape (or size) from the non-corner common electrodes TE2. The corner common electrodes TE1 according to this example have a square shape, with a rounded portion rounded in a curved shape with a predetermined radius of curvature at one corner adjacent to the corner portion TAa of the touch area TA. TE1b). The non-corner common electrodes TE2 have a square shape.

The rounded portion TE1b of the corner common electrodes TE1 may have a first radius of curvature r1, and the corner portion TAa of the touch area TA may have a second radius of curvature different from the first radius of curvature r1. It may have a radius of curvature (r2). At this time, the center points of the first radius of curvature (r1) and the second radius of curvature (r2) may be the same. That is, the rounded portion TE1b of the corner common electrodes TE1 and the corner portion TAa of the touch area TA may be formed in a concentric circle shape and parallel to each other. Accordingly, this example can minimize the size difference between the corner common electrodes TE1 and the non-corner common electrodes TE2 caused by the corner part TAa of the touch area TA, and thereby minimize the size difference between the corner common electrodes TE1 and the non-corner common electrodes TE2. It is possible to minimize the difference in touch sensitivity between the electrodes TE1 and the non-corner common electrodes TE2.

As such, the display device according to the present example uses a non-corner common electrode having different shapes (or different sizes) because the contact areas between the common electrodes TE and the corresponding touch link lines T1 to Tp are all the same. The difference in touch sensitivity between the electrodes TE2 and the corner common electrodes TE1 may be minimized, and as a result, the touch sensitivity for the corner touch area CTA may be improved.

Through the above-described content, those skilled in the art will be able to see that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the claims.

10: Display panel 11: Pixel electrode
13: liquid crystal layer 20: timing controller
30: gate driver 40: data driver
50: main processor 60: touch driving unit
70: common voltage compensation unit 80: touch panel
P: Pixel PA: Display area
TE: common electrode G1~Gn: gate lines
D1~Dm: data lines T1~Tp: touch link lines
FL: Feedback line 300: Cover window
500: Housing 900: Driving circuit part

Claims (14)

delete delete delete A substrate comprising a touch area having a corner touch area;
a plurality of gate lines arranged in a first direction on the substrate;
a plurality of data lines arranged in a second direction crossing the first direction;
a plurality of pixel areas defined by intersections of the plurality of gate lines and the plurality of data lines;
a plurality of common electrodes arranged to overlap at least one pixel area; and
A plurality of touch link lines are electrically connected to the plurality of common electrodes and extend in a direction parallel to the first direction or the second direction,
Among the plurality of touch link lines, a first gap between the first group of touch link lines passing through an edge portion of the touch area including the first common electrode disposed on the corner touch area is the first group of touch links. Different from the second spacing between the second group of touch link lines passing through the second common electrodes disposed on the remaining touch areas excluding the edge portion of the touch area where the lines pass,
The first group of touch link lines and the second group of touch link lines are arranged side by side with each other. According to claim 4,
The first gap is narrower than the second gap. According to claim 5,
The first common electrode and the second common electrode have different shapes. According to claim 5,
The first common electrode and the second common electrode have different sizes. According to claim 4,
Each of the plurality of common electrodes and the plurality of touch link lines are connected through the same number of contact holes. According to any one of claims 4 to 8,
The first common electrode includes a chamfered portion or a rounded portion. According to clause 9,
The touch link lines passing through the first common electrode are spaced apart from the chamfered portion or the rounded portion. According to claim 10,
The touch area includes a corner portion rounded in a curved shape with a constant radius of curvature,
The chamfered portion or the rounded portion is provided in a corner portion adjacent to a corner portion of the touch area. According to claim 11,
The first common electrode includes a rounded portion provided at one corner adjacent to the corner of the touch area,
A display device wherein a rounded portion of the first common electrode has a concentric circle shape with a corner portion of the touch area. According to any one of claims 4 to 8,
A display device wherein the plurality of common electrodes are used as touch electrodes for touch sensing. According to claim 4,
Each of the plurality of common electrodes and the plurality of touch link lines have the same contact area.

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